Thinking Machines Lab
Mira Murati's lab — a record $2B seed and a fine-tuning product (Tinker).
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Founded by OpenAI's former CTO with a deep OpenAI alumni bench, Thinking Machines raised a reported $2B seed at ~$10–12B valuation and shipped Tinker, an API for fine-tuning open models, as its first product.
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Record reviewed as of 2026-01-15 — see Methodology.